28529556 has 24 divisors (see below), whose sum is σ = 72621024. Its totient is φ = 8645280.

The previous prime is 28529549. The next prime is 28529561. The reversal of 28529556 is 65592582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107935 + ... + 108198.

It is an arithmetic number, because the mean of its divisors is an integer number (3025876).

Almost surely, 2^28529556 is an apocalyptic number.

It is an amenable number.

28529556 is an abundant number, since it is smaller than the sum of its proper divisors (44091468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28529556 is a wasteful number, since it uses less digits than its factorization.

28529556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216151 (or 216149 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The square root of 28529556 is about 5341.3065817270. The cubic root of 28529556 is about 305.5612919596.

It can be divided in two parts, 285 and 29556, that multiplied together give a triangular number (8423460 = T₄₁₀₄).

The spelling of 28529556 in words is "twenty-eight million, five hundred twenty-nine thousand, five hundred fifty-six".